Blow-off cock.



G. ROAN & H. HELMHOLZ. BLOW-OFF COCK.

APPLICATION FILED JUNE 15. 1914.

I 1 131,422, Patented Mar. 9, 1915.

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GnURGE BQAZ AND $31533. HELMHC'LZ; C'I' UHEUAGQ, Ki L1H $15.

BLUW-DFF GOGK.

Application filed has 35, 1514.

To all whom it may cr /fawn Be it known that We, (inonon BOA}; and }IE;\RY HicLMnoLZ. citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have inientecl certain new and useful lmproveniej'its in Blowllii" Cocks, of which the following is a specifimtion.

Our invention relates to blow-off cook's and has for its primary ohj ct tho provision of an improved l. 1ow--oil" cock which shall have improved menus of attachment to a steam hoiler or like device.

li'ith tlm alaovo and other ol ieuts in "ivw thixinwntiiuo vomists substantially in the UHH inutimh arrangement, and cowti'uction of port- 3, all us hnrciiluttm' tlonrilmtl, shown in thrn x-o1n mrvi|1g l,i'-;1\\'i1',;s., which i'orm :i purt of this spmi'iliuntiun and show the prcl'crrwl Plltlmtllllltlllj of our in\ ontiuin 3111i moresponiliczilly set. forth in like llulfithl rluims.

in the drawings: Figure 'l mi elwsution (-l n lttz ilzilil portion of our invention. Fig i is r: s ntion of our invention showing it :ittm'hml to the will of :1 strain boiler wnich i also shown in section. Fig. is :i :i-ntion of our invention tnluzn on th s line i -5 of Fig. '2. anti looking in the direction indltfzhiul luv th-v urrumx-s. Fig l is :1 906M011 of our inmntion tulmn on the line -i---l of Fig. l uml looking: in th lirv 3ti0n indicated in ti & urrmis. 5 in an innur eml (in ration of our invention showing it ttziched to thv wull of u hoilm' or like de ice. Fig. 6 is un Plm'ution of the remuimlor of on inwntion from which the portion shown in his: 1 ir; (lvtwhwl. nil illustrates in section u portion of the wall of a boiler or liko tlewimto which it is iltlith'ihitl.

The ordinary railroad lonomotire is provided adjacent the hotton'i or" its boiler with n l low-otl cock ope nhln from the cah of the lOUOtHUtiH, h moans of which the engineer pm'iorlicully blows out sludge and other im pnritiivs from the boiler. It a tliszitlvnrr tugxw that un ordinary hlowotl' cool; when it is out of order cannot, be removal for adjustnmnt or repair rile the hoiler of tho loconiotiiw uminr Strum: pzir {a it lining luicvszsuijv to put the lowomtia'e out. of my mission by n'itlulrzu ing in; t res 'llltl re" in the stvinn and water from S21 l'ely reniuiworl from phat hmlvr. By the liiit. of our inwntiwi Spicifimtim. of Lsrters Patent.

P'Hih'lfii 5d MI $5., 1&15.

disadvantage is ohvifitecl, for no IirOYitli n blow-oil cork connected to ihe boiler tl'n'ougih n hollow plug; rlnvuhln :it its inner anal. the blow-oil cock lining dei'ulohnhlo from the plug :il trr the inner enrl o? the plop; has hnnn cl ml, i

Hutu we nnnwrnl 1U irulimtu; t n wall of a l'hsll-S! whfih is z'ms'tiuwitl for Or were hunt with :1 hollow plug ll. The inner nil ot the plug i1 i irm'irl il nith 1: web ii whivh is zipvrturwfl as at 17?- tuz the? was :111'3 of fluid ninl al n provider! as at 14; withh central round :ipw'tiirrf r snr gennent with. n, bolt 15 i snionth mavhiiz l stirtntrn t mmml hr tlzv \ul: l1. and {3h EIUICZ 011 i oi ti 0 plug lit. and ."klflfitl" z'insi. tl'iiir snrt zirrv is 0112' iilzulv nmuhinwl nurl'zico ol llislt 1 3. all is prinnlml ith iiinr turns 11' :uluptwi hi i vermin tion 0t thr- (irsl; to l'tgib'itl' an; tho uwri'inwR i l. The (link Hi I with is central squared mgr-ii i. h .tvii' with tho munzl :qwrtmrii f fin Th8 iaolt I rnq'zignr tho pm'tnrs ii mail 1 l Tilll omulwi win I it vngngm: (hr anertum l -l; and squared t nilnr v t thi n'pvrturiz 18 For iIlQMILHLCHt lflmrr hi 'rlflw innit (n/l r-l the holt l5? for hllffflfiunnl' with :1 mil lt to li l it upon the lmlti, .l w o if? Miri upon tln holt mlintflll its: oninr (will, forms an abutment i unrtvul n? th sm'inn' nun!- lhil 21 the (m waitv (N l 01 r-ihiuh izliub, ugziini t thr outer surt'nz'v ol' the we!) ii. RV this Construction tho {ff-1 icoristnnt cngngmr' nnl 11' the plug l1 and t minnow. of he bolt, iii {hr I, ,1 owilliitml to bring an im wrl'omtn g nrzson lit the disk o nmsito tho HU l'KH'PS l? to (fish them or \K't \(nz u to Mme npcrtur :H]( l l? to rrstii'iter :nrl pm; nl th pun go 03" l'lnitl outwurdl; from the lmilmn A hnlt union nut 273 of any nrli lznmrn construction encirvlrs the outer end an thr hollow plug 11. the plug living: proviilml with. the orilinilrr pnriplwml ilringu at its outer end for e1iffflfltilhi-lit with tho nut. The outer end of ihe pl y it is; nuchiineil or ground to :1 smooth Sllll HF-I and fitting ill! -l v thereto tho nne ev l ml the lJilV-Y-0lT cr 5 i; rim ire llt om r nuriplwry of tlli, in'inn' nu l oi the lihm otl rock Q3 being! threaded for 'zrn'irnt. wi hiiii union nut 22, bv

The blow-ofi' cock 23 is provided with the ordinary discharge nozzle indicated by reference numeral 24 and it is also provided with a central-hollow sleeve The outer end of the blow-off cock 23 is centrally bored off cock 23, and the inner end is formed into a disk 28 similar to the disk 16 but of such a diameter as to fit closely within the interior of the hollow plug ll. The stem 26 also fits closely within its passageway to prevent the escape 'of fluid. Apertures 29 similar to the apertures 13 and 17 are formed in the disk 28 and the disk is provided with a central squared hole for engagement with a squared extension 30 formed upon the outer end of the bolt 15. The squared extension upon the outer end of bolt 15 takes the form of a pyramid, the sides of which meet at the apex in preferably an acute angle. The central squared hole provided in the outer end of stem 26 is of a shape and size conforming. to the pyramidal extension upon the outer end of bolt 15. To prevent a binding of the parts a slight space is left between the engaging surfaces of the pyramidal extension and the squared hole. The inner end of the blowoff cock 23 is provided with apertures 31 similar to the apertures 29 and adapted to register opposite those apertures in certain positions of the disk 28. Preferably there is provided between the inner end of the blow-oil cock 23 and the adjacent surface of the disk a wear ring 32 provided with apertures 33 registering with the apertures 29 of the disk 28, the wear ring 32 and disk 29 being secured for rotation together within the hollow plug 11 by means of small pins 34 (see Fig. 3). The outer end 27 of the stem 26 is squared for engagement with a crank 35 which is held thereon by any suitable means such as the cotter pin 36. A washer 37 encircles the stem 26 and lies against the outer end of the blow ofl' cock 23, and disposed between this washer and the crank 35 is a compression spring member 38 which exerts an outward pressure upon the stem 26. This binds the disk 29 and the wear ring 32 closely to the inner end of the blow-ofl' cock 23. The outer end of the blow-off cock 23 is provided with oppositely disposed scctonshaped extensions 39 which act as stops for a guard pin 40 transversely secured in the stem 26. The washer contacts upon its inner surface with the outer surfaces of the s ctor-shaped extensionsBQ.

If. for any reason. an'obstruction prevents the rotation of disk 16 in the closing of the blowptf cock. the form of connection be tween bolt 15 and stcm 26 will permit the closing of the blow-off cock bv disk 28 and wear ring 32, for the reason that the inclined surfaces of the pyramidal extension 30 will slide with relation to the engaging faces cf the squared hole in the inner end of the stem 26, forcing the bolt inwardly against the pressure of spring member 21.

From the foregoing description it will be seen that by rotating the stem 26 the bolt 15 will be similarly actuated and both the disks 16 and 29 and the wear ring 32 will be turned in either direction, the amount of turn being limited by contact of the guard pin -10 with the sector-shaped extensions 39. In Fig. 2 the parts are shown inopen position for the free outward passage of the fluid from the boiler. The rotation of the stem 26 will bring imperforate portions of the disk 16 opposite the apertures 13, closing those apertures, and will also bring imperforate portions of the disk 29 and the wear ring 32 opposite the apertures 31, closing (lime apertures also. If it is desired to remove the blow ofl cock and its valve members 29 and 32 from the boiler for the purposes of adjustment or repair the stem is oscillated in the above mentioned manner to close the inner end of the hollow plug 11, after which the half union nut 22 is rotated from its threaded engagement with the blow-off cock 23 and the blow-off cock withdrawn.

By means of the contact of smoothly machined or ground surfaces in our mechanism and the continual close contact provided for therebetween by means of the spring members 21 and 38 we obviate leakage through our device. By the use of the wear ring 32 which is detachable from the di 1' :28 we provide an easy means of taking up wear by substituting a new wear ring for a worn one. If it is sired to permit fluid to pass outwardly from the boiler through the plug 11 when the blow-off cock is detached it is apparent that a wrench may be applied to the squared extension 30 of the bolt 15 and the disk 16 thereby rotated.

In the accompanying drawings and in the foregoing description is set forth the preferred embodiment of our invention. but it is obvious that one skilled in the art may make modifications thereof without departing from the spirit of the invention.

Ve claim:

1. The combination of an apertured plug having a valve seat at one end thereof, a r0- tary valve fitted on said valve seat and adapted to cooperate therewith, a. blowotl cock casing secured to the other end of said said valves causing the first mentioned valve to be operated upon operation of the second mentioned valve and adapted to permit the operation of the latter when the first mentioned valve is locked b an obstruction.

3. The combination 0 a pressure chamber wall provided with an opening, a centrally bored plug secured in the opening and provided with a hollow outer end and a passage for fluid, a peripheral flange upon the outer end of the plug, a blow-ofi' cock normally controlling the i passage of fluid through the plug and provided with an exteriorly handled controlling stem having a squared aperture upon itsim'ier end, a half union nut upon the plug cooperating with the flange and blow-off cock to removably secure the cock to the plug, a bolt mounted for oscillation in the central bore of the plug and provided at its outer end with a squared extension engaging the squared aperture of the stem, and an apertured disk fixed upon the inner end of the bolt for oscillation therewith for controlling the passage of fluid through the plug. I

4. The combination of a pressure chamber wall provided with an opening, a blow-off cock normally controlling the opening and detachable from the wall, an additional device for closing the opening, and a frictional spring pressed connection between the blowofl" cock and the additional devicewhereby the blow-off cock may beeaused when operated to operate the additional device simultaneously, but whereby obstruction of the 5. The combination of an apertured plu having a valve seat at one end, a blow-'o cock secured to the other end of said plug, a disk valve fitted with said valve seat, a valve stem secured to said disk valve and extending into said plug into close proximity with said blow-ofi' cock, and a clutch operatively connectin said valve stem with said blow-off cock an being ada ted to permit the operation of the blow-o cock when the disk valve is locked by an obstruction.

6. The combination of an apertured plug having a valve seat at one end thereof, a blo'w-ofi' cock secured to the other end of the plug and having a valve seat opposite said plug, a rotary valve fitted to the valve seat on said casing, there being a recess pyramid in form in the side of said valve on its side adjacent said plug, a manually operable valve stem secured to said valve and extending through said casing, a rotary valve fitted to the valve seat on said plug, a valve stem on the last mentioned valve eX- tending into said plug and disposed in alinement with said manually operable valve stem, a spring on each of said valve stems resiliently holding its respective valve in operative condition, and a tongue pyramid in form onthe end of the second mentioned valve stem and disposed in said pyramid recess providing an operative connection between said valve and stems.

In testimony whereof we have signed our names to this specification, in the presence of two subscribing witnesses, on this 11th day of June, A. D. 1914.

GEORGE ROAN. HENRY HELMHOLZ.

\Vitnesses 1 CHARLES H. SEEM, -EDGAR FRANCIS BEAUBIEN. 

